I can tamper you can tamper she can tamper we can tamper you can tamper they can tamper
V-ing form
I can be tampering you can be tampering she can be tampering we can be tampering you can be tampering they can be tampering
Perfect
I can have tampered you can have tampered she can have tampered we can have tampered you can have tampered they can have tampered
V-ing perfect
I can have been tampering you can have been tampering she can have been tampering we can have been tampering you can have been tampering they can have been tampering
Negation
Simple form
I cannot tamper you cannot tamper she cannot tamper we cannot tamper you cannot tamper they cannot tamper
V-ing form
I cannot be tampering you cannot be tampering she cannot be tampering we cannot be tampering you cannot be tampering they cannot be tampering
Perfect
I cannot have tampered you cannot have tampered she cannot have tampered we cannot have tampered you cannot have tampered they cannot have tampered
V-ing perfect
I cannot have been tampering you cannot have been tampering she cannot have been tampering we cannot have been tampering you cannot have been tampering they cannot have been tampering
Interrogative form
Simple form
can I tamper? can you tamper? can she tamper? can we tamper? can you tamper? can they tamper?
V-ing form
can I be tampering? can you be tampering? can she be tampering? can we be tampering? can you be tampering? can they be tampering?
Perfect
can I have tampered? can you have tampered? can she have tampered? can we have tampered? can you have tampered? can they have tampered?
V-ing perfect
can I have been tampering? can you have been tampering? can she have been tampering? can we have been tampering? can you have been tampering? can they have been tampering?
Interro-negative form
Simple form
can I not tamper? can you not tamper? can she not tamper? can we not tamper? can you not tamper? can they not tamper?
V-ing form
can I not be tampering? can you not be tampering? can she not be tampering? can we not be tampering? can you not be tampering? can they not be tampering?
Perfect
can I not have tampered? can you not have tampered? can she not have tampered? can we not have tampered? can you not have tampered? can they not have tampered?
V-ing perfect
can I not have been tampering? can you not have been tampering? can she not have been tampering? can we not have been tampering? can you not have been tampering? can they not have been tampering?